<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>CSS滤镜2</title>
    <style>

        body{
            background: url('../背景/bg2.jpg');
        }


        .test{
            height: 200px;
            width: 200px;
            margin: auto;
            font-size: 100px;
            margin-top: 150px;

            resize: both;
            overflow: auto;

            /* filter: blur(5px); */
            backdrop-filter: blur(5px);
        }
    </style>
</head>

<body>
    <div class="test">1234</div>

</body>

</html>